Soulfood,
It is a good idea to prime your brand new Atty with the juice you re going to first use in the Atty. I put a carto condom on the threaded end of the Atty, then I fill the Atty up to the bridge, and let it sit for good 15-30 min. Then I take off the Carto condom and blow out the Atty. This technique will properly prime the internals of your Atty ( Any Atty ) thus not letting your wick get burnt and just properly ready the Atty, it is totally ready to drip now. I have been using this method for a long time and it works. Give it a whirl
When changing to a new flavor it's good to blow it out then do the same by putting some PG/VG in the Atty, let it sit for a bit then blow that out, then start with a fresh juice.